@penguinpablo does daily steem stats and from them you can find out the actual number of users ACTUALLy using steem which can be seen with Posts that have comments, or accounts that are actually making transactions
https://steemit.com/steemit/@penguinpablo/daily-steem-stats-report-friday-may-3-2019
here is a great way to guess at active users,
Daily accounts transacting
and the average seems to be a little under 50K which seems REALISTIC
A 'transacting account' is a Steem account that made at least one transaction on the Steem blockchain. This can be a vote, post, comment, transfer, power up or sbd conversion. Users who only read from the Steem blockchain without interacting are not included. The actual number of 'Active users' is therefore much higher than the accounts transacting.
Yeah I think the question was based around individuals. I have 6/7 accounts transacting daily - main, actifit, old witness, ENGAGE token, drugwars x 2. Some people have a lot more, but some also use only one and so working out how many humans are behind the daily total of transacting accounts is trickier.
The question was how many people - in a sense of human beings - are active on Steem. We came to the conclusion that there's probably about 10K loyal users executing those transactions with their main and alt accounts. Just think about how many accounts people like berniesanders have.
It's a small but a strong community that can create an impact if necessary.